Electricity Bill Calculator
Find out what your appliances cost to run and estimate your monthly electricity bill accurately.
How It Works
Converts watts to kWh and multiplies by your electricity rate ($/kWh) to show daily, monthly, and annual costs.
Formula
kWh = Watts × Hours ÷ 1,000
Daily Cost = kWh × Rate
Monthly = Daily × 30
Example
AC 1,500W, 8h/day, $0.13/kWh:
12 kWh/day × $0.13 = $46.80/month
When to Use This Calculator
Use to understand which appliances drive your bill, evaluate energy-efficient upgrades, or estimate costs when moving.
Common Mistakes to Avoid
- Wrong rate — check your utility bill for the actual rate.
- Forgetting standby power — many devices draw 1–5 watts when off.
- Not accounting for seasonal variation — HVAC dramatically changes bills.
Frequently Asked Questions
Average US electricity rate?
$0.12–$0.16/kWh nationally. Ranges from $0.09 to $0.30+ by state.
Highest electricity users?
HVAC (1–5 kW), water heater (4 kW), dryer (5 kW), refrigerator (continuous 150–400W).
TV electricity cost?
55" LED TV ≈ 100W. 5h/day at $0.13/kWh ≈ $1.95/month.
What is a kilowatt-hour?
Energy used by a 1,000-watt device running for 1 hour.
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Last Updated: July 4, 2026